[ggambetta]

I happened to be in San Francisco during the Camp fire late last year. Even far from the fire itself, the air outside was terrible, and for a week or two I felt miserable and trapped. Not being able to breathe properly, or open a window, or go anywhere for days on end wasn't fun.

Most of the cities in that list are just as bad as that, all year round. I can't even begin to imagine what it feels like to live like that permanently, or what it does to your health :(